JP2019016709A - Cooling device, exhaust purification device and automobile - Google Patents

Abstract

An object of the present invention is to provide a cooling device that is small in size and capable of cooling efficiently. The fin includes a heat sink having a plurality of fins formed on one surface of a base, and a coolant supply unit that supplies a coolant to the fins of the heat sink. And a hydrophilic region, wherein the hydrophilic region is formed on the base portion side of the fin, and the water-repellent region is formed on a side remote from the base portion. Solve the problem. [Selection diagram] Fig. 1

Description

  The present invention relates to a cooling device, an exhaust purification device, and an automobile.

  It is generally known that a device on which a semiconductor element or the like is mounted generates heat when operated. When such devices or semiconductor elements generate heat and become high temperature, malfunctions may occur in the semiconductor elements, etc., or they may cause failure. Yes. There are various kinds of such cooling devices.

JP-A-60-124756 JP-A-7-283034 JP 2013-64578 A JP-A-9-283678 JP 2010-911146 A JP 2007-115810 A

  Such a cooling device is required to be small and capable of cooling efficiently.

  According to an aspect of the present embodiment, the heat sink includes a heat sink having a plurality of fins formed on one surface of the base portion, and a refrigerant supply unit that supplies a refrigerant to the fin of the heat sink. A water repellent region and a hydrophilic region are formed on the surface, the hydrophilic region is formed on the base portion side of the fin, and the water repellent region is formed on the side away from the base portion. Features.

  The disclosed cooling device is small in size and can be efficiently cooled.

Structure diagram of cooling device and exhaust gas purification device in the first embodiment Structure diagram of heat sink in the first embodiment Illustration of heat sink used for comparison (1) Illustration of heat sink used for comparison (2) Characteristic diagram of temperature change in heat sink when mist water is supplied Flowchart of the cooling method in the first embodiment Structural diagram of heat sink in the second embodiment Structure of heat sink in the third embodiment The principal part enlarged view of the structure of the heat sink in 3rd Embodiment Structure diagram of cooling device and exhaust gas purification device in fourth embodiment Flowchart of the cooling method in the fourth embodiment Explanatory drawing of the automobile in the fifth embodiment

  The form for implementing is demonstrated below. In addition, about the same member etc., the same code | symbol is attached | subjected and description is abbreviate | omitted.

[First Embodiment]
The cooling device and the exhaust purification device in the first implementation will be described. The exhaust emission control device in this embodiment has a DPF (Diesel Particulate Filter) that collects particulates such as PM (Particulate matter) from exhaust gas from a diesel engine or the like. Fine particles such as PM deposited on the DPF can be regenerated by irradiating with microwaves generated by a microwave generator and heating to remove them. The cooling device in the present embodiment is used to cool such a microwave generator and the like.

  Currently, exhaust gas purification devices using DPF have been put into practical use as devices for collecting particulates such as PM contained in exhaust gas. Such an exhaust purification device is required to regenerate the DPF because particulates such as PM accumulate on the DPF when used. As a method for regenerating the DPF, for example, there is a method using a microwave radiated from a microwave heating device. Specifically, the microwave generator generates microwaves and irradiates the generated microwaves to the DPF, thereby heating and burning particulates such as PM deposited on the DPF to regenerate the DPF. Do.

  The DPF is installed inside an exhaust system such as a bus or truck on which a diesel engine is mounted. The microwave generator irradiates the DPF efficiently with the microwave generated by the microwave generator. Is installed. However, since the regeneration of the DPF is performed by removing particulates such as PM deposited on the DPF by heating with a microwave, the periphery of the DPF is likely to become a high temperature, and the periphery of the microwave generator is 100 ° C. May be more. Further, the microwave generator is provided with an amplifier circuit for obtaining a high-output microwave. When the microwave is generated as a continuous wave (CW), the amplifier circuit is formed. The temperature of the semiconductor element etc. rises.

  As described above, when the temperature of the semiconductor element or the like rises, the operation of the semiconductor element or the like becomes unstable, and a desired microwave cannot be generated stably or the life of the semiconductor element or the like may be shortened. Furthermore, the semiconductor element itself may be destroyed. For this reason, it is necessary to cool the microwave generator. A simple method of cooling the microwave generator is to cool it by applying outside air. However, in the case of air cooling, the temperature of the outside air becomes high in midsummer, so the microwave generator should be sufficiently cooled. Can not do it. In addition, although water cooling can be considered as a method having a relatively high cooling capacity, it is difficult to install these in the vicinity of an exhaust system such as a truck or a bus because it is necessary to provide piping for water cooling.

  Accordingly, there is a need for a cooling device that is small and can efficiently cool the microwave generator.

(Cooling system)
Next, the cooling device in the first embodiment will be described with reference to FIG. The cooling device 100 in the present embodiment is attached to an exhaust purification device 50 that purifies exhaust generated in a diesel engine. The exhaust gas purification device 50 is provided with a particulate collection unit 10 formed of DPF or the like in the housing unit 20 and further includes a microwave generator 30 that generates microwaves. The DPF is formed of, for example, a honeycomb structure in which adjacent vents are alternately closed, and the exhaust is discharged from a vent different from the vent of the inlet.

  The casing 20 is made of a metal material such as stainless steel and covers the periphery of the particulate collection unit 10. The housing unit 20 includes a suction unit 21 into which exhaust gas enters and a discharge unit 22 through which purified exhaust gas is discharged. In the exhaust emission control device 50, exhaust gas such as exhaust gas from the engine or the like enters the housing portion 20 from the suction portion 21 in the direction indicated by the dashed arrow A. Exhaust gas such as exhaust gas that has entered the housing unit 20 is purified by passing through the particulate collection unit 10 and is discharged from the discharge unit 22 in the direction indicated by the dashed arrow B.

  The microwave generator 30 can generate an electromagnetic wave of 300 MHz to 6 GHz, for example, a microwave of 2.45 GHz. In the microwave generator 30, a semiconductor element formed of a nitride semiconductor is used to generate a high-output microwave necessary for heating the particulate collection unit 10. In the exhaust gas purification device 50, the particulate matter collecting unit 10 is irradiated with the microwave generated by the microwave generator 30, thereby heating and oxidizing the particulate matter such as PM deposited on the particulate matter collecting unit 10. To remove.

  When the particulates such as PM deposited on the particulate collection unit 10 are burned and removed, the microwave generator 30 generates microwaves and irradiates them in order to heat the particulates such as PM. As described above, in order to efficiently irradiate the particulate collection unit 10 with the microwave generated by the microwave generator 30, it is preferable to install the microwave generator 30 near the particulate collection unit 10. . Thus, when the microwave generator 30 is installed in the vicinity of the particulate collection unit 10, when the particulate collection unit 10 is irradiated with microwaves in order to remove particulates such as PM, the particulate collection unit 10 becomes hot. Therefore, this heat may be transmitted to the microwave generator 30. Also, when removing particulates such as PM, heat is generated in the microwave generator 30 because a semiconductor element for generating microwaves operates. Accordingly, heat is applied from both inside and outside the microwave generator 30.

  The cooling device 100 in the present embodiment includes a heat sink 110, a wind tunnel 120, a fan 130, a refrigerant injection unit 140, a compressor 150, a refrigerant tank 160, a temperature measurement unit 170, a control unit 180, and the like.

  The heat sink 110 is in contact with the microwave generator 30, and the heat sink 110 and the microwave generator 30 are installed in a space 121 in the wind tunnel portion 120. A fan 130 is provided on the windward side of the wind tunnel portion 120 so that the wind can flow from the broken line arrow C to the direction indicated by the broken line arrow D. The refrigerant injection unit 140 is a refrigerant supply unit that supplies the refrigerant, and is for injecting water as the refrigerant toward the heat sink 110, and stores the compressor 150 that generates compressed air and the water that is the refrigerant. The refrigerant tank 160 is connected. Furthermore, a temperature measurement unit 170 for measuring the temperature of the heat sink 110 is provided on the side of the heat sink 110 that contacts the microwave generator 30. The refrigerant injection unit 140 and the temperature measurement unit 170 are controlled by a control unit. 180. In the present embodiment, the compressor 150 and the refrigerant tank 160 may be connected to the control unit 180. The temperature measuring unit 170 may be provided inside the microwave generator 30 and measure the temperature of the microwave generator 30.

(heatsink)
Next, the heat sink 110 of the cooling device in the present embodiment will be described with reference to FIG. The heat sink 110 includes a base portion 111 and a plurality of fins 112 provided so as to extend substantially perpendicular to one surface 111 a of the base portion 111. The heat sink 110 is entirely formed of a metal material having high thermal conductivity such as aluminum (Al) or copper (Cu). Further, the surface of the water-repellent region 112 a above the fin 112 of the heat sink 110 is subjected to water-repellent treatment. Specifically, a fluorine-based resin film is formed on the surface of the water-repellent region 112a, or the surface is finely processed to repel water. Further, the hydrophilic region 112b and the base portion 111 below the fins 112 of the heat sink 110 are subjected to hydrophilic treatment. Specifically, a titanium oxide film or the like is formed on the surfaces of the hydrophilic region 112b and the base portion 111, chemical etching such as wet etching is performed, or blasting is performed. In the present application, a region having a water contact angle of 90 ° or more is defined as a water repellent region, and a region having a water contact angle of less than 90 ° is defined as a hydrophilic region.

  In the present embodiment, a hydrophilic region 112 b is formed on the base portion 111 side of the fin 112 of the heat sink 110, and a water repellent region 112 a is formed on the side away from the base portion 111.

  In the present embodiment, the heat sink 110 is made of aluminum, has a width W of 25 mm, a length L of 25 mm, a height H of 15 mm, and the fin 112 has a height Hf of 13 mm and a thickness Wf. Is formed at 0.5 mm. Although FIG. 2 shows a case where seven fins 112 are provided, the number of fins 112 is not limited to this number. In the present embodiment, the water-repellent region 112a above the fins 112 of the heat sink 110 has a fluorine resin film having a thickness of 5 μm on the surface so that the contact angle of water is about 110 °. Is formed. Further, the hydrophilic region 112b and the base portion 111 below the fins 112 of the heat sink 110 are blasted using fine particles of alumina, and are formed so that the contact angle of water is about 70 ° to 80 °. Yes. Examples of the fine particles used for the blast treatment include silicon oxide, ice, and dry ice other than alumina.

  The heat sink 110 is installed on the microwave generator 30, and the other surface 111 b of the base portion 111 of the heat sink 110 is in contact with the microwave generator 30. Thereby, the heat generated in the microwave generator 30 can be radiated from the fins 112 of the heat sink 110.

(cooling)
In the present embodiment, refrigerant injection unit 140 that injects water, which is a refrigerant, is installed above fins 112 of heat sink 110 and can inject water toward fins 112 of heat sink 110. Note that the direction in which gravity works is the direction from top to bottom. The fins 112 of the heat sink 110 are installed such that the water repellent region 112a is on the top and the hydrophilic region 112b is on the bottom, and the direction in which gravity acts is the direction from the water repellent region 112a toward the hydrophilic region 112b. In the present application, the refrigerant injection unit 140 may be described as a refrigerant supply unit.

  In the present embodiment, mist-like water having a particle diameter of 100 μm to 200 μm is sprayed from the refrigerant injection unit 140 toward the fins 112 of the heat sink 110 as a whole. Specifically, water is supplied to the fins 112 from the upper side, which is the side opposite to the side where the base portion 111 is provided in the heat sink 110. The supplied water may be in the form of droplets, but is more preferably in the form of a mist from the viewpoint of adhesion to the fins 112 and the like.

  The mist-like water sprayed from the refrigerant injection unit 140 toward the fin 112 of the heat sink 110 adheres to the water-repellent region 112a on the upper portion of the fin 112, but the water-repellent region 112a is subjected to water-repellent treatment, so It is repelled and flows downward due to gravity. A hydrophilic region 112b below the fin 112 is formed below the water repellent region 112a above the fin 112 of the heat sink 110, and water repelled by the water repellent region 112a above the fin 112 It flows to the lower hydrophilic region 112b. The hydrophilic region 112b and the base portion 111 below the fin 112 are subjected to a hydrophilic treatment, so that water attached to the surface spreads and a thin water film is formed.

  In the present embodiment, a wet water film is formed on the surface of the hydrophilic region 112b and the base portion 111 below the fin 112, so that water can be efficiently vaporized and the heat of the heat sink 110 is efficiently used. Can take away well. Thereby, the microwave generator 30 in contact with the heat sink 110 and the heat sink 110 can be efficiently cooled.

  Further, in the present embodiment, the microwave generator 30 and the heat sink 110 are installed in a space 121 in the wind tunnel portion 120, and a fan 130 is provided on the windward side of the space 121. When the fan 130 provided on the windward side of the space 121 rotates, the wind flows in the space 121 in the wind tunnel 120, but the longitudinal direction of each fin 112 is installed along the direction in which the wind flows. The wind flows between the fins 112 and 112. The fan 130 is adjusted so that the wind speed in the space 121 in the wind tunnel 120 is 5 m / s. Since the wind flows in the vicinity of the hydrophilic region 112b where the water of the fins 112 of the heat sink 110 is wet and spread, the wet spread water is efficiently vaporized. Therefore, the microwave generator 30 in contact with the heat sink 110 is removed. It can be cooled efficiently.

(Cooling experiment)
Next, an experiment on the effect of cooling was performed on the heat sink of the cooling device in the present embodiment. Specifically, an experiment was conducted to measure the temperature of the heat sink by injecting mist-like water from the refrigerant injection unit 140 to the heat sink 110 in the present embodiment shown in FIG. For comparison, the same applies to the heat sink 910A shown in FIG. 3 where the water-repellent region and the hydrophilic region are not provided, and the heat sink 910B provided with the hydrophilic region 112b shown in FIG. 4 but not provided with the water-repellent region. Then, the temperature was measured. In addition, the water supplied from the refrigerant | coolant injection part 140 is mist-like water with a particle size of 100 micrometers-200 micrometers, and the wind speed of the wind which flows through the vicinity of a heat sink was 5 m / s. The heat sink 910 </ b> A and the heat sink 910 </ b> B have substantially the same outer shape and fins as the heat sink 110 of the cooling device in the present embodiment.

  The result is shown in FIG. As shown in FIG. 5, the temperature of the heat sink 110 in this embodiment and the heat sink 910B shown in FIG. 4 are higher than those of the heat sink 910A shown in FIG. 3 where the water repellent region and the hydrophilic region are not provided. It could be lowered and was effective for cooling. This is because the heat sink 910A shown in FIG. 3 does not have a hydrophilic area on the fin or the like, so even if water adheres to the fin, the water does not spread on the surface of the fin or the like, but drops and drops down. This is because the cooling is not performed efficiently.

  Further, as shown in FIG. 5, the heat sink 110 in the present embodiment can be further lowered in temperature than the heat sink 910B provided with the hydrophilic region 112b shown in FIG. This is because by providing the water-repellent region 112a, water attached to the water-repellent region 112a is repelled, so that water can be efficiently collected in the hydrophilic region 112b near the microwave generator 30 that is generating heat. It is assumed that there is. Therefore, the heat sink having both the water-repellent region and the hydrophilic region is more effective for cooling than the one having only the hydrophilic region. In FIG. 5, the temperature rises again after an elapsed time of 1 minute to 2 minutes. This is considered to be due to the vaporization of water adhering to the fins of the heat sink. Therefore, it is preferable that the water supply from the refrigerant injection unit 140 to the heat sink is performed at a predetermined time interval in consideration of the vaporization time.

(Cooling method)
Next, a cooling method using the cooling device in the present embodiment will be described with reference to FIG. The cooling method in the present embodiment is controlled by the control unit 180, and controls the refrigerant injection unit 140, the compressor 150, the refrigerant tank 160, or the like based on the temperature measured by the temperature measurement unit 170. Is. In the present embodiment, the fan 130 may rotate with the start of the regeneration process, or may rotate constantly. At this time, the wind speed of the wind generated by the fan 130 is about 5 m / s.

  First, in step 102 (S102), regeneration processing of the DPF that is the particulate collection unit 10 is started. Specifically, when the amount of particulates such as PM deposited on the particulate collection unit 10 exceeds a predetermined value, the regeneration processing of the particulate collection unit 10 is started. The regeneration process of the particulate collection unit 10 is performed by irradiating the particulate collection unit 10 with the microwave generated by the microwave generator 30 and heating it. Thereby, the temperature of the particulate collection unit 10 rises, and this heat is transmitted to the microwave generator 30 installed in the vicinity of the particulate collection unit 10, and the semiconductor element of the microwave generator 30 is also microwaved. The heat of the microwave generator 30 rises due to heat generation.

  Next, in step 104 (S104), the temperature measurement unit 170 measures the temperature. As shown in FIG. 1, the temperature measurement unit 170 may be attached to the heat sink 110, but may be provided inside the microwave generator 30. It is preferable to provide a temperature measurement unit 170 inside the microwave generator 30 because a more accurate temperature can be measured.

  Next, in step 106 (S106), it is determined whether or not the temperature measured in step 104 is equal to or higher than a predetermined temperature. Specifically, it is determined whether or not the temperature measured in step 104 is 50 ° C. or higher. If the temperature measured in step 104 is equal to or higher than the predetermined temperature, the process proceeds to step 108. If the temperature is lower than the predetermined temperature, the process proceeds to step 104 and the temperature is measured again.

  Next, water is supplied to the heat sink 110 in step 108 (S108). Specifically, mist-like water is jetted from the refrigerant jet unit 140 toward the heat sink 110, for example, for 5 seconds. Thereby, the mist-like water adhering to the surface of the water-repellent region 112a of the heat sink 110 flows down from the water-repellent region 112a of the fin 112 to the hydrophilic region 112b and spreads on the surface of the hydrophilic region 112b. In the present embodiment, the refrigerant injection unit 140 is not controlled, but the compressor 150 and the refrigerant tank 160 are controlled to inject mist of water from the refrigerant injection unit 140 toward the heat sink 110. There may be.

  Next, in step 110 (S110), the system waits for a predetermined time. For example, it waits for about 1 minute to elapse. Even if mist-like water is sprayed from the coolant injection unit 140 toward the heat sink 110, it takes time to wet and spread on the surface of the hydrophilic region 112b of the fin 112, and since water has low thermal conductivity, It takes time for water to evaporate and for the temperature to drop. For this reason, it waits for a predetermined time.

  Next, in step 112 (S112), it is determined whether or not the regeneration process of the DPF that is the particulate collection unit 10 has been completed. Specifically, the regeneration process of the particulate collection unit 10 is performed by irradiating the particulate collection unit 10 with microwaves generated by the microwave generator 30 for about 30 minutes. Therefore, the determination may be made based on whether or not 30 minutes have elapsed since the start of the regeneration process of the particulate collection unit 10 in step 102. If the regeneration process of the particulate collection unit 10 is completed, the process is terminated as it is. If the regeneration process of the particulate collection unit 10 is not completed, the process proceeds to step 104. When the regeneration process of the particulate collection unit 10 is completed, the generation of microwaves in the microwave generator 30 is also stopped.

[Second Embodiment]
Next, a second embodiment will be described. In the present embodiment, as shown in FIG. 7, the fin 212 of the heat sink 210 has a structure in which the windward side of the fin 212 has a wider hydrophilic region 212b and a water-repellent region 212a narrower than the leeward side. . Moreover, the refrigerant | coolant injection part 140 is provided in the windward side of the heat sink 210, and mist-like water is supplied with respect to the heat sink 210 from an upwind direction. Thus, since the hydrophilic region 212b is formed up to the upper side of the fin 212 of the heat sink 210, the water that spreads wet to the hydrophilic region 212b is vaporized and heated by the wind flowing upward. Take away. In addition, since the hydrophilic region 212b is formed on the lower side of the fin 212 of the heat sink 210, the water flowing in the hydrophilic region 212b is vaporized by the wind flowing downward to take heat away. The wind flowing in the wind tunnel portion 120 is air, and when the saturated vapor pressure of the air exceeds, water does not evaporate. Therefore, in the present embodiment, water is vaporized by the wind flowing upward on the windward side of the fin 212 of the heat sink 210, and water is vaporized by the wind flowing downward on the leeward side of the fin 212 of the heat sink 210. As a result, water can be efficiently vaporized. Thereby, the temperature of the microwave generator 30 can be lowered more efficiently.

  The contents other than the above are the same as in the first embodiment.

[Third Embodiment]
Next, a third embodiment will be described. In the present embodiment, as shown in FIGS. 8 and 9, a groove 313 along the vertical direction is provided on the surface of the fin 312 of the heat sink 310. FIG. 8 is a perspective view of the heat sink 310 in the present embodiment, and FIG. 9 is an enlarged view of a part of the fin 312 of the heat sink 310.

  The heat sink is sprayed with mist-like water from the refrigerant jet part 140 and adheres to the surface of the water-repellent area of the fin. Water is repelled in the water-repellent area of the fin and flows into the wind from the direction indicated by the dashed arrow C. It can be thrown away and leave the fins. In this way, the water droplets blown away by the wind do not contribute to the cooling of the heat sink.

  Therefore, in the present embodiment, the fin 312 is provided with the groove 313 extending in the vertical direction. As a result, even if water droplets attached to the water-repellent region 312a of the fin 312 are swept away by the wind, the water droplets enter the groove 313. It flows downward in the groove 313 and spreads wet in the hydrophilic region 312b. In this way, water attached to the fins 312 of the heat sink 310 can be effectively used for cooling. In the present embodiment, the groove 313 formed in the fin 312 has, for example, a width Wt of 0.1 mm and a depth Dt of 0.1 mm. Further, the inside of the groove 313 may be subjected to a hydrophilic treatment.

  The contents other than the above are the same as in the first embodiment.

[Fourth Embodiment]
Next, the cooling device in the fourth embodiment will be described. As shown in FIG. 10, the cooling device in the present embodiment has a structure in which the fan 130 is also connected to the control unit 180, and the fan 130 and the refrigerant are based on the temperature measured by the temperature measurement unit 170. The injection unit 140 and the like are controlled. In the state where water droplets as a refrigerant are supplied from the refrigerant injection unit 140 toward the heat sink 110, if the wind flowing near the heat sink 110 is strong, the water droplets are caused by the wind before or after adhering to the heat sink 110. Will be washed away. For this reason, in the present embodiment, while the water droplets are supplied from the refrigerant injection unit 140 toward the heat sink 110, the water droplets are caused to flow by the wind by weakening or stopping the rotation of the fan 130. It is what prevents it.

  Next, a cooling method using the cooling device in the present embodiment will be described with reference to FIG. The cooling method in the present embodiment is controlled by the control unit 180, and controls the fan 130, the refrigerant injection unit 140, and the like based on the temperature measured by the temperature measurement unit 170.

  First, in step 202 (S202), the regeneration process of the DPF that is the particulate collection unit 10 is started. Thereby, the temperature of the microwave generator 30 rises.

  Next, in step 204 (S204), the temperature measurement unit 170 measures the temperature.

  Next, in step 206 (S206), it is determined whether or not the temperature measured in step 204 is equal to or higher than a predetermined temperature. Specifically, it is determined whether or not the temperature measured in step 204 is 50 ° C. or higher. If the temperature measured in step 204 is equal to or higher than the predetermined temperature, the process proceeds to step 208, and if it is lower than the predetermined temperature, the process proceeds to step 204 and the temperature is measured again.

  Next, in step 208 (S208), water serving as a coolant is supplied toward the heat sink 110. At this time, if the fan 130 is rotating, the wind speed is decreased by reducing the rotation speed of the fan 130 or stopping the rotation. This wind speed is 1 m / s or less, for example. Specifically, mist-like water droplets are ejected from the refrigerant ejection unit 140 toward the heat sink 110, for example, for 5 seconds. During this period, the rotational speed of the fan 130 is decreased or the rotation speed is stopped. Reduce. Accordingly, the water droplets can be efficiently attached to the fins 112 of the heat sink 110 without being splashed, and the surface of the hydrophilic region 112b can be wetted and spread.

  Next, in step 210 (S210), after the supply of water droplets as a refrigerant toward the heat sink 110 is completed, the fan 130 is rotated at a higher speed or when the fan 130 is stopped. Let the wind speed of the flowing wind rise. This wind speed is about 5 m / s.

  Next, in step 212 (S212), a predetermined time is waited. For example, it waits for about 1 minute to elapse.

  Next, in step 214 (S214), it is determined whether or not the regeneration process of the DPF that is the particulate collection unit 10 has been completed. Specifically, when the regeneration process of the particulate collection unit 10 is completed, the process ends as it is, and when the regeneration process of the particulate collection unit 10 is not completed, the process proceeds to step 204.

  The contents other than those described above are the same as in the first embodiment, and the heat sink in the second embodiment or the third embodiment may be used as the heat sink in the present embodiment. In the present embodiment, the compressor 150 and the refrigerant tank 160 may be controlled instead of the control of the refrigerant injection unit 140.

[Fifth Embodiment]
Next, a fifth embodiment will be described. The present embodiment is an automobile on which the cooling device and the exhaust purification device in the first embodiment are mounted. The automobile in the present embodiment will be described with reference to FIG.

  The automobile 500 in the present embodiment includes the cooling device 100, the exhaust purification device 50, the engine 510 such as a diesel engine, the air conditioner 520, and the like in the first embodiment.

  In the automobile 500 in the present embodiment, the exhaust port of the engine 510 is connected to the suction part 21 of the housing part 20 of the exhaust purification device 50, and the exhaust from the engine 510 is the particulate collection part of the exhaust purification device 50. 10 is purified and discharged from the discharge portion 22 of the housing portion 20. In addition, although it is necessary to store water as the refrigerant in the refrigerant tank 160, the refrigerant tank 160 may be supplemented with water when fuel is supplied to the automobile.

  In addition, an air conditioner 520 is mounted on the automobile 500 or the like, and the air conditioner 520 may be used to cool the vehicle in a hot summer season in order to maintain comfort in a room in which the driver is riding. Although water is generated during cooling by the air conditioner 520, the water is stored in the refrigerant tank 160 and supplied to the heat sink 110 of the cooling device, thereby cooling the air conditioner 520. The generated water can be used effectively.

  The automobile in the present embodiment may be one using the cooling device in the second to fourth embodiments.

  Although the embodiment has been described in detail above, it is not limited to the specific embodiment, and various modifications and changes can be made within the scope described in the claims.

In addition to the above description, the following additional notes are disclosed.
(Appendix 1)
A heat sink in which a plurality of fins are formed on one surface of the base portion;
A refrigerant supply unit for supplying a refrigerant to the fins of the heat sink;
Have
On the surface of the fin, a water repellent region and a hydrophilic region are formed,
The cooling device, wherein the hydrophilic region is formed on the base portion side of the fin, and the water repellent region is formed on a side away from the base portion.
(Appendix 2)
The cooling device according to appendix 1, wherein a fan is provided for flowing air toward the heat sink.
(Appendix 3)
The width of the hydrophilic region formed on the fin is such that the windward side of the wind is wider than the leeward side,
The cooling apparatus according to appendix 2, wherein the width of the water repellent region formed on the fin is formed so that the windward side of the wind is narrower than the leeward side.
(Appendix 4)
4. The cooling device according to any one of appendices 1 to 3, wherein the fin is provided with a groove from the water-repellent region toward the hydrophilic region.
(Appendix 5)
The cooling device according to any one of appendices 1 to 4, wherein the heat sink is installed such that a direction from the water repellent region to the hydrophilic region of the fin is a direction in which gravity works.
(Appendix 6)
The cooling device according to any one of appendices 1 to 5, wherein the refrigerant supplied from the refrigerant supply unit is in the form of droplets or mist.
(Appendix 7)
7. The cooling device according to any one of appendices 1 to 6, wherein the water repellent region is formed by forming a resin film containing fluorine on a surface of the fin.
(Appendix 8)
Any one of Supplementary notes 1 to 7, wherein the hydrophilic region has a titanium oxide film formed on a surface of the fin, or a chemical etching process or a blast process is performed on the surface of the fin. The cooling device according to 1.
(Appendix 9)
A heat generating member is in contact with the other surface of the base portion of the heat sink, and the heat generating member is cooled,
9. The cooling device according to any one of appendices 1 to 8, further comprising a temperature measuring unit that measures the temperature of the heat sink or the heat generating member.
(Appendix 10)
The cooling device according to appendix 9, wherein a control unit that controls supply of the refrigerant from the refrigerant supply unit is provided based on the temperature measured by the temperature measurement unit.
(Appendix 11)
The cooling device according to appendix 10, wherein the control unit starts supply of the refrigerant from the refrigerant supply unit when the temperature of the temperature measurement unit becomes equal to or higher than a predetermined temperature.
(Appendix 12)
The cooling device according to any one of appendices 1 to 11, wherein the refrigerant is water.
(Appendix 13)
The cooling device according to any one of appendices 1 to 11,
A particulate collection unit for collecting particulates contained in the exhaust;
A microwave generator for generating a microwave to irradiate the particulate collection unit;
Have
An exhaust gas purification apparatus, wherein a microwave generator is in contact with the other surface of the base portion of the heat sink.
(Appendix 14)
The exhaust emission control device according to appendix 13, wherein the refrigerant is water.
(Appendix 15)
The exhaust emission control device according to appendix 14,
An air conditioner,
Have
A refrigerant tank for storing water generated during cooling by the air conditioner;
An automobile characterized in that water stored in the refrigerant tank is used when the refrigerant is supplied from the refrigerant supply unit.

DESCRIPTION OF SYMBOLS 10 Particulate collection part 20 Case part 21 Inhalation part 22 Discharge part 30 Microwave generator 50 Exhaust purification apparatus 100 Cooling device 110 Heat sink 120 Wind tunnel part 130 Fan 140 Refrigerant injection part 150 Compressor 160 Refrigerant tank 170 Temperature measurement part 180 Control part

Claims (13)

A heat sink in which a plurality of fins are formed on one surface of the base portion;
A refrigerant supply unit for supplying a refrigerant to the fins of the heat sink;
Have
On the surface of the fin, a water repellent region and a hydrophilic region are formed,
The cooling device, wherein the hydrophilic region is formed on the base portion side of the fin, and the water repellent region is formed on a side away from the base portion.   The cooling device according to claim 1, further comprising a fan that allows air to flow toward the heat sink. The width of the hydrophilic region formed on the fin is such that the windward side of the wind is wider than the leeward side,
The cooling device according to claim 2, wherein the width of the water-repellent region formed in the fin is formed so that the windward side of the wind is narrower than the leeward side.   The cooling device according to claim 1, wherein the fin is provided with a groove from the water-repellent region toward the hydrophilic region.   The cooling device according to any one of claims 1 to 4, wherein the refrigerant supplied from the refrigerant supply unit is in the form of droplets or mist.   6. The cooling device according to claim 1, wherein the water-repellent region is formed by forming a resin film containing fluorine on a surface of the fin.   7. The hydrophilic region according to claim 1, wherein a titanium oxide film is formed on a surface of the fin, or a chemical etching process or a blast process is performed on the surface of the fin. A cooling device according to claim 1. A heat generating member is in contact with the other surface of the base portion of the heat sink, and the heat generating member is cooled,
The cooling device according to claim 1, further comprising a temperature measuring unit that measures the temperature of the heat sink or the heat generating member.   The cooling device according to claim 8, further comprising a control unit that controls supply of the refrigerant from the refrigerant supply unit based on the temperature measured by the temperature measurement unit.   The cooling device according to claim 9, wherein the control unit starts supply of the refrigerant from the refrigerant supply unit when the temperature of the temperature measurement unit becomes equal to or higher than a predetermined temperature. The cooling device according to any one of claims 1 to 10,
A particulate collection unit for collecting particulates contained in the exhaust;
A microwave generator for generating a microwave to irradiate the particulate collection unit;
Have
An exhaust gas purification apparatus, wherein a microwave generator is in contact with the other surface of the base portion of the heat sink.   The exhaust emission control device according to claim 11, wherein the refrigerant is water. An exhaust emission control device according to claim 12,
An air conditioner,
Have
A refrigerant tank for storing water generated during cooling by the air conditioner;
An automobile characterized in that water stored in the refrigerant tank is used when the refrigerant is supplied from the refrigerant supply unit.

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